Figure 4
From: Directional Movement of Droplets in Grooves: Suspended or Immersed?
Dynamic droplet movements within the Etched SAM and Smooth SAM grooves during simulated growth and evaporation.
(a1) The upper and lower meniscuses move upward simultaneously as the droplet volume increases, causing the droplet to depart from the Etched SAM groove bottom. (a2) For the Smooth SAM groove, the upper meniscus moves upward as the droplet volume increases, while the lower meniscus stays fixed. (b1) The droplet in the Etched SAM groove moves downward during evaporation with the upper and lower meniscuses retracting almost simultaneously. (b2) For the Smooth SAM groove, the upper meniscus retracts into the groove bottom during evaporation, while the lower meniscus stays fixed. The scale bar denotes 1 mm.
